Connecting rod



Patented Sept. 5, 1922.

Fir... 1

CIB. DREVITSON. CONNECTING ROD. v A APPLIcmoN man nanfa. 192|`-1,427,788.

Patented Sept. 5, 1922.

UNITED STATES PATENT OFFICE.

CONNECTING ROD.

Application filed December 8, `1921. Serial No. 520,887.

To (Zlwmm t may concern:

Be itknown that I, CARL B. DmevrrsoN, a

`citizen oi the United. States, residing at Somerville, in the countyot' Middlesex and State ot Massachusetts, have invented new and useiulImprovements in Connecting Rods, of which the following' is aspecification.

This invention relates to a connecting-rod pivotallf,Y connected at itsouter end to a piston in the combustion cylinder of an internalcombustion engine, and connected atits inner end rwith a bearingsurrounding the wrist portion of a crank-shaft.

The object of the invention is to provide a connecting-rod ot simple anddurable construction, adapted to yieldingly cushion the direct blow onthe crank-shaft caused by the combustion or 'explosion of a charge ofgaseous material in the cylinder, in such manner as to reduce wear onthe bearing, and eliminate shocks or jars, so that the engine will runquietly and smoothly.

rl`he invention is embodied in the improvements hereinafter describedand claimed.

Oi' the accompanying drawings forming a part of this specification,-

Figure "1 `is a view showing in section a piston and a `portion of acrank-shaft, and partly in elevation, and partly in section, aconnecting-rod embodying the invention.

Figure 2 is a section on line 2 2 of Figure 1. c i

Figure 3 is a section on line 3 3 of Figure 1. l y

Figure f1 is a fragmentary perspective view, showing portions of theconnectingrod and bearing, said portions being connected.

The same reference charac-ters indicate the same parts in all ofthefigures.

My improved connecting-rod is adapted to connect the piston 12 and thewrist 13 of the crank-shaft of an internal combustion engine, the rodbeing pivotally connected at one end with the piston, and provided atthe opposite end with a bearing surrounding the wrist 13.

The connecting-rod includes an elongated rigid body 14C, preferablyformed in cross section, as shown by Figure 2, and provided at one endwith a rigid member 15, forming an element of the usual7 or any suitableonepoint pivotal connection between the rod and the piston, permittingthe rod to oscillate as usual, and conform to the revolving movement ofthe crank-shaft wrist.l

The body 14 is provided at 'its opposite end with means forming aresilient twopoint connection between the body and thecrank-shaftbearing, adapted to yield sufiiciently to cushion the blow ora-bruptpressure on the bearing and crank-shaft, caused by the combustionof a gaseous working agent in the cylinder containing the piston. Saidtwo-point connection is preferably provided by forming on the inner endofthe body 141, two extensions 1G, which are integral withthe body, andconstitute elbowshaped springs, rigidly connected at their outer endswith the ears 17 on a part or member 19 of a two-part bearing. Theconnecting-rod is, therefore, bifurcated at itsl inner ends, itsfurcations being resilient. The said extensions and the said bearingmember may be rigidly connected in any suitable way. For example, theextensions may be formed integral with the bearing member by adrop-forging operation, the body 17, its extensions, and the bearingmember and its ears being formed as asingle piece or forging.

The 'form of the two-point connecting means and the body 14 is suchtliatthe bearing member 19 is separated from the inner end of the bodyby a space or recess2l, which receives a portion of the bearing, andpermits Van independent endwise movement of the body 19, without contactof its inner end with the bearing, said recess extending across thebearing, so that the body 14 is connected with the bearing at twopoints,

one at each side of the axis of the bearing. i

A bloW or shock on the piston is therefore yieldingly transmitted to thebearing and the crank-shaft by two springs, one at each side of thelongitudinal center of the body 14, so that the strain is distributedbetween the Springs, and liability of the Seeing or l the springs 1savoided.

The crank-shaft bearing may include a. member 22 complemental to themember 19, the members being detachably connected as by bolts 23.

I claim:

1. A connecting-rod comprising an elongated rigid body, having at oneend a rigid member forming an element of a one-point pivotal connectionbetween said body and a piston; and at` its opposite end a crankshaft1caring member, and ieans forming a resilient two-point connectionbetween the body and the said member, said means being integral with thebody and. the bearing member, and adapted to space the bodyh from thebearing member.

2, A' connecting-rod comprising,` an elongated riqid body, having` atone end a rigid member forming an element oi"- a one-point pivotal.connection between said body and a piston; and at its opposite end acranksha'li't bearing` member and a pair ot oppositely projectingresilient extensions itorming a resilient twofpoint coroiectionv betweensaid body and bearing)` member, and adapted to space the body from saidmember, said bearing` member and eXtensions being` integral with thebody.

3. A connecting-rod comprising,` an elon-r gated rigid body, havingatone end a rigid member rorming anzelement of a one-point pivotalconnection between said body and a piston, the opposite end of said bodyhaving a crank-shaft bearing member' and resilientI means forming', withthe body, a recess adapted to receive a portion of said bearing member,said resilient means forming a two-point connection between the bodyndthe bearing` member, andadapted to `space the body from said member,said bearing` member and resilient means being integral with the body. i

il, A one-piece connecting-rod comprising an elongated rigid body,having` at one end anintegral member forming an element ot a one-pointpivotal connection between said body and a piston; and having at theopposite end, integral resilient means ibi-ming` ,a resilient two-pointconnection between the body and a crank-shaft bearing, and 'forming,with the body, a recess adapted to receive a' portion oi' the bearing,said twopoint connection being adapted to space the body from the,bearinm y 5. A connecting-rod comprising an elongated rigid bodyportion, and a bifurcated lower end portion, the nrcations of which areresilient, and form a resilient two-point connection between the bodyportion and a crank-shaft bearing, adapted to space lthe body portionfrom thel bearing, the opposite .end of the body portion ha 7ing,` arigid member forming` an element of a one-point pivotal connectionbetween the body portion and a piston.

6. In a connecting-rod, in combination, a crank-shalt bearing, and anelongated rigid rod body, having at one end a rigid member forming; anelement ot a one-point pivotal connection between the body and a piston,and atA its opposite end means resiliently connecting; the body with thebearing; at two points, 4one at each side of the bearing, said meansspacing` the body from the bearing.

i?. In a connecting-rod, in combination, a crank-shaft bearing, and anelongated rigid ,rod body, having at one end a rigid member 'ormiimjv anelement of a one-point pivotal connection between the body and a piston,andat its opposite end a pair of oppositely projecting resilientextensions,

forming a resilient two-point connection between the body and thebearing, and spac- .inn` the body from the bearing.

S. ln `a connecting-rod, in combination, crank-shaft bearing, and anelongated rigid rod body, having at one end a rigid member formingl anelement of a one-point pivotal connection between the body and a piston,and at its opposite end a pair of oppositely projecting resilientextensions, forming a resilient two-point connection between tho bodywith the bearing, and spacing` the body from the bearing, saidextensions forming,` with the body a recess receivinn` portion of thebearing, and spacing the body trom the bearing. n

ln testimony whereof I have alixed my signature.

CARL Benno nnnvrrsoN.

